@PostMapping(path = "/ninja/addNew", consumes = "application/json")
  public String addNewNinja(AddNewNinjaDTO newNinja){
    Ninja ninja = new Ninja();
    ninja.setName(newNinja.getName());
    //ninja.setClan(clanService.findById(newNinja.getClan()).get());
    //ninja.setVillage(villageService.findById(newNinja.getVillage()).get());
    ninja.setStatus(newNinja.getStatus());
    ninja.setAge(newNinja.getAge());
    ninja.setSex(newNinja.getSex());
    ninjaService.save(ninja);
    return "ok";
  }

public class AddNewNinjaDTO{
  private String name;
  private Long clan;
  private Long village;
  private String status;
  private int age;
  private String sex;
//getters and setters
}

curl -H "Content-Type: application/json" -d '{"name":"Roma","clan":2,"village":2,"status":"alive","age":20,"sex":"M"}' -X POST http://localhost:8080/narutopedia/ninja/addNew

ERROR: null value in column "name" of relation "ninja" violates not-null constraint                                                                                                                                            
  Detail: Failing row contains (7, null, 0, null, null, null, null).

>Annotation for mapping HTTP GET requests onto specific handler methods.
Specifically, @GetMapping is a composed annotation that acts as a shortcut for @RequestMapping(method = RequestMethod.GET)